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參數(shù)資料
| 型號(hào)： | MAX3243ECAI |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 19/19頁(yè) |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 250KBPS SD 28-SSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 46 |
| 類型： | 收發(fā)器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 3/5 |
| 規(guī)程： | RS232 |
| 電源電壓： | 3 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SSOP（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-SSOP |
| 包裝： | 管件 |
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±15kV ESD-Protected, 1A, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
Table 1. Output Control Truth Table
+0.3V
-0.3V
INVALID
TO MAX32_ _E
POWER SUPPLY
AND TRANSMITTERS
R_IN
* TRANSMITTERS ARE DISABLED, REDUCING SUPPLY CURRENT TO 1
A IF
ALL RECEIVER INPUTS ARE BETWEEN +0.3V AND -0.3V FOR AT LEAST 30
s.
30
s
COUNTER
R
Figure 3a. MAX32_ _E Entering 1A Supply Mode via
AutoShutdown
+2.7V
-2.7V
INVALID
TO MAX32_ _E
POWER SUPPLY
R_IN
*TRANSMITTERS ARE ENABLED IF:
ANY RECEIVER INPUT IS GREATER THAN +2.7V OR LESS THAN -2.7V.
ANY RECEIVER INPUT HAS BEEN BETWEEN +0.3V AND -0.3V FOR LESS THAN 30
s.
30
s
COUNTER
R
Figure 3b. MAX32_ _E with Transmitters Enabled Using
AutoShutdown
X = Don’t Care
A mouse or other system with AutoShutdown may need
time to wake up. Figure 4 shows a circuit that forces
the transmitters on for 100ms, allowing enough time for
the other system to realize that the MAX3221E/
MAX3223E/ MAX3243E are awake. If the other system
transmits valid RS-232 signals within that time, the RS-
232 ports on both systems remain enabled.
When shut down, the device’s charge pumps are off,
V+ is pulled to VCC, V- is pulled to ground, and the
transmitter outputs are high impedance. The time
required to exit shutdown is typically 100s (Figure 5b).
Software-Controlled Shutdown
If direct software control is desired, INVALID can be
used to indicate DTR or Ring Indicator signal. Connect
FORCEOFF and FORCEON together to disable Auto-
Shutdown so the line acts like a SHDN input.
±15kV ESD Protection
As with all Maxim devices, ESD-protection structures are
incorporated on all pins to protect against electrostatic
discharges encountered during handling and assembly.
The driver outputs and receiver inputs of the
MAX3221E/MAX3223E/MAX3243E have extra protection
against static electricity. Maxim’s engineers have devel-
oped state-of-the-art structures to protect these pins
against ESD of ±15kV without damage. The ESD struc-
tures withstand high ESD in all states: normal operation,
shutdown, and powered down. After an ESD event,
Maxim’s E versions keep working without latchup,
whereas competing RS-232 products can latch and
must be powered down to remove latchup. See Table 4.
0
1
X
1
FORCEON
X
Active
R2OUTB
(MAX3243E)
Active
High-Z
R_OUT
(MAX3221E/
MAX3223E)
Active
High-Z
1
0
1
FORCEOFF
0
Active
High-Z
Active
T_OUT
High-Z
Active
High-Z
Active
R_OUT
(MAX3243E)
High-Z
Active
High-Z
0
Yes
No
Normal Operation
(AutoShutdown)
Yes
0
X
Normal Operation
(Forced On)
X
Shutdown
(Forced Off)
X
EN
(MAX3221E/
MAX3223E)
VALID
RECEIVER
LEVEL
0
X
OPERATION
STATUS
1
0
Active
High-Z
1
High-Z
Active
Shutdown
(AutoShutdown)
No
1
Maxim Integrated
9
MAX3221E/MAX3223E/MAX3243E
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| MAX3243ECAI+ | 功能描述:RS-232接口集成電路 3-5.5V 250kbps Transceiver RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3243ECAI+T | 功能描述:RS-232接口集成電路 3-5.5V 250kbps Transceiver RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3243ECAIT | 制造商:MAX 功能描述:* |
| MAX3243ECAI-T | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3243ECDB | 功能描述:RS-232接口集成電路 3-5.5V MultiCh Line Driver/Receiver RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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